Birthday parties..

So I’m trying to organise my LO 3rd birthday party and it’s already a nightmare! There’s only 10 invited (for cost reasons) I’ve already had one friend ask can she bring another boy as she’s said she would babysit him for her friend and another friend say her child has dance lesson the same time so can’t come… am I expecting too much for people to just commit to bringing their child? It’s a special day for my child and I just feel so let down.. what’s wrong with people 🙄